5045 use atomic_{inc,dec}_* instead of atomic_add_*

@@ -402,11 +402,11 @@
 #define SCTP_SLC_REPORT_INTERVAL        (30 * MINUTES)
 
 #define SCTP_DECR_LISTEN_CNT(sctp)                                      \
 {                                                                       \
         ASSERT((sctp)->sctp_listen_cnt->slc_cnt > 0);                   \
-        if (atomic_add_32_nv(&(sctp)->sctp_listen_cnt->slc_cnt, -1) == 0) \
+        if (atomic_dec_32_nv(&(sctp)->sctp_listen_cnt->slc_cnt) == 0) \
                 kmem_free((sctp)->sctp_listen_cnt, sizeof (sctp_listen_cnt_t));\
         (sctp)->sctp_listen_cnt = NULL;                                 \
 }
 
 /* Increment and decrement the number of associations in sctp_stack_t. */